XRK4993 Datasheet, PDF (2/13 Pages) Exar Corporation – 3.3V PROGRAMMABLE SKEW CLOCK BUFFER

XRK4993
3.3V PROGRAMMABLE SKEW CLOCK BUFFER
PRODUCT ORDERING INFORMATION
PRODUCT NUMBER
XRK4993IR-2
XRK4993CR-2
XRK4993IR-5
XRK4993CR-5
XRK4993IR-7
XRK4993CR-7
ACCURACY
250 ps
250 ps
500 ps
500 ps
750 ps
750 ps
REV. 1.0.0
OPERATING TEMPERATURE RANGE
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
0°C to +70°C
FIGURE 2. PIN OUT OF THE XRK4993
CLKIN 1
VCCQ 2
FSEL 3
SELC0 4
SELC1 5
PE 6
V_CCN 7
QD1 8
QD0 9
GND 10
QC1 11
QC0 12
V_CCN 13
FB_IN 14
QSOP
Top View
28 GND
27 PLL_BYPASS
26 SELB1
25 SELB0
24 OE
23 SELA1
22 SELA0
21 V_CCN
20 QA0
19 QA1
18 GND
17 GND
16 QB0
15 QB1
FSEL^[2,3]
LOW
MID
HIGH
TABLE 1: FREQUENCY RANGE SELECT AND t_U CALCULATION ^[1]
f_NOM (MHZ)
t_U = 1 / (f_NOM X N)
MIN
MAX
WHERE N =
15
35
44
25
60
26
40
85
16
APPROXIMATE
FREQUENCY (MHZ) AT
WHICH t_U = 1.0ns
22.7
38.5
62.5
2